Lavatory basin



FIG. 1 is a front, raised perspective view of a lavatory basin according to the invention;

FIG. 2 is a left side view of the lavatory basin according to FIG. 1;

FIG. 3 is a right side view of the lavatory basin according to FIG. 1;

FIG. 4 is front view of the lavatory basin according to FIG. 1;

FIG. 5 is a rear side view of the lavatory basin according to FIG. 1;

FIG. 6 is a top view of the lavatory basin according to FIG. 1; and,

FIG. 7 is a bottom view of the lavatory basin according to FIG. 1.

The broken lines shown in the drawings form no part of the claimed design. Further, the lavatory basin is shown with a symbolic break in its width. The appearance of any portion of the lavatory basin between the break lines forms no part of the claimed design. The surface shading illustrated in the drawings is provided merely to highlight the contour of the design and is not part of the claimed design. All surfaces not shown form no part of the claimed design. 

CLAIM The ornamental design for a lavatory basin, substantially as shown and described. 